Pump.



A. L. LIGON.

PUMP.

APPLICATION FILED JUYNE 5 Patented Apr. 24, 1917.

2 SHEETS-SHEET ll l A INT/EN TOR.

./ITTORNEY.

A. L. LIGON.

PUMP.

APPLICATION FILED JUNE 5,1916.

Patented Apr. 24, 1917.

2 .SHEETS-SHEET 2.y

S S .E N. H W

PATENT oEEicE.

ARTHUR LEE LIGON, OFFORT STOCKTON, TEXAS.

i PUMP.

To all whom it may concern: e

Be it known that I, ARTHUR L. LiGoN, a citizen of the United States, residing at Fort Stockton, in the county`A of Pecos and State" of Texas, have invented certain new and useful Improvements in Pumps, of which the following is a specification.

My invention has relation to an improvement in deep well pumpsof particularly that type or'class wherein the well easing for the relatively. deep well is formed of detachable sections and the pump barrel, pump, sucker rod andaccessories. all are arranged to be readily removed from the well casing for the purpose of repairs or renewal of parts, and in such connection it'l relates to provision of means whereby the pum -barrel may be securely lockedA to position in the well casing during'the operation of the pump and yet readily released from said casing when the pump .parts and barrel are to be removed from said casing.

In `deep well pumps whether 'for water or oil the casingof the'well is formed of a plurality of sections united together by coupling sleeves or collars. These sections and their couplings should be so arranged as to permit of the ready insertion of the pump bar rel, plunger and auxiliary parts into the casin tion in the well and also topermit ofthe withdrawal of said `pump barrel and pump parts without withdrawing or disturbing the casing.

Heretofore vsuch 'construction of casing,v pump barrel and pump have been attempted but so far as am aware there has been no simple and elicient means for locking the pump barrel with its lowcrvalve- 1n proper position in thecasing, such locking means maintaining the barrel and lower valve in such proper positiondurng the working of the pump.

While the main object of my presentrinvention is to provide such simple and eflicient means for so locking th e pump barrel in proper position in the casing, an equally 1 mportant object of the invention is to provide a means whereby during an erratic stroke of the pump plunger or piston in the barrel,

said barrel will not be disengaged or shifted out of its proper position but the excess of stroke will be taken up and automatically remedied without however preventing the Specication of Letters Patent.

after said casing 'is placed in posi-` Patentea Apr. 24., i917.

Application led J' une 5, 1916.. Serial No. 101,722.

The nature and scope of my inventionl will be more fully understood from the following description tak'en in connection with the accompanying drawings forming a part hereof, in which- Figure 1, is a vertical sectional view of a deep well pump embodying the main features of my invention.

Fig. 2, is an enlarged View of the upper portion of Fig. l.

Fig. '3, is an enlarged view of the lower portion ofl Fig. 1.

Fig.' 4, is a view partly in section but showing the piston head and lower valve in elevation.

Fig. 5, is an elevational view artly broken away illustrating the pump an well casing.

Figs. 6, 7 and 8kk are cross-sectional views taken respectively on the lines 6-6, 7--7; and v8--8 of Fig. 2.

Fi 9, is a cross-sectional view taken on i the line 9-9 of Fig. 3.

Referring to the drawings the well casing is formed of a series of sections of which l, incloses and supports the pump barrel 2, the lower end of section 1 is connected with the next lower section by a coupling 3 which internally is inverted frusto-conical in shape to form a valve 'seat 4 for the valve 5 carried by the lower end of the pump barrel 2. The upper end of.y section. 1A is connected to a next preceding section of the casing by a coupling 6 having an interior diameter slightly larger than the exterior diameter of the' pump barrel 2. The construction and arrangement of the lower valve 5 are illus-- yetA accurately seat itself in the casing coiipling 3 when the pump barrel 2 is in position.- Specifically considered the valve 5 consists of a tubular piece 7 closed at its upper end by a ball 8 and screw threaded in collar 9 carrying the cage 10 for saidball 8. The lower end of the tubular piece 7 is laterally and transversely slotted as at 11 to permit ofthe insertion of a suitable key or tool and of the turning of the tube 7 to remove it from the collar 9. On the exterior ofvtubular piece 7 is arranged a series of tapered packing rings 12 which when in position constitutes a conical or frusto-conical exterior fitting snugly the frusto-conical interior of coupling 3. The collar 9 has its lower edge provided with a key seat or slot 13 so that said collar 9 may be advanced or retracted by screw threaded engagement with or out of the interior of the lower end of the pump barrel 2. t

The piston 14 working in barrel 2 comprises a tubular body 15 having its upper end closed by a ball 16 held 1n cage 17 which cage is screw threaded to the upper end of said body 15.. On the exterior of body 15 is arranged alternate washers or packing rings 18 and clamping sleeves 19, the whole structure being held 1n place by the lower sleeve 19, screw threaded on the exterior of` the lower end of tubular body 15. This lower sleeve 19a has its lower edge slotted as at 20 to permit of the use of a tool in advancing or retracting the sleeve 19a on the tubular body`15. The cage 17 is screw threaded to the lower end of the lowest section 21 of the sucker rod.

The means for properly supporting the pump barrel 2 so that its lower valve 5 shall be seated in the seat 4 formed by coupling 3 during the 'operation of pumping and the means for locking the barrel in prescribed position will now be explained.

The top of the barrel 2 is screw threaded to and carried bya tubular head 22 provided between its exterior .and the interior of coupling 6 in which it fits, with packing rings or washers 23 and 24 arranged respectively near the lower and the upper end of the coupling 6. These packing rings 23, 24 serve as mudguards or means for preventing sand and dirt entering between the barrel 2 and casing section 1. Itis obvious that if such means were not provided the gradual accumulation of sand and dirt in the space between barrel and casing. would soon pack hard and act as a grouting or cement to prevent removal of the barrel from the casinif it were desirable to remove the barrel.

he tubular head 22 is locked to the coupling 6 by locking fingers 25 having enlarged yends 26 entering recesses .27 in the interior of coupling 6., These fingers 25 are spring fingers and can move or bend upward upon their fastenings 28, at the upper end of the fingers, to withdraw the enlarged ends 26 from said slots or recesses 27. To permit of this inward bending of fingers 25 at the proper time, the head 22 is vertically slitted from a. point below the point of fastening 28 to a point `below the enlarged ends 26.

Itis apparent from the foregoing description that when the head 22 attached to barrel 2 is pushed into place and locked to the coupling 6, the normal action of piston or plunger 14 in said barrel proceeds without disturbing the relation of the head 22 or the lower valve 5 in theirirespective seats or supports. However, an unusual or erratic stroke of the pump might cause piston 14 to strike the lower end of head 22 and thus lift said head out of locking engagement with coupling 6 and so elevate barrel 2 and lowerl valve 5 from the lower seat 4 in coupling 3. To prevent such accidental displacement of barrel 2 and head 22 I provide a means for taking up this erratic movement of the piston. In its simplest form this take-up mechanism comprisesv a tube. 30 sliding in and closely fitting the tubular head 26, said tube 30 being held downward in said head 22 preferably by a spring 31 coiled around the exterior of the lower portion of the tube 30 and interposed between the flange 32 on the lower end of the tube 30 and the shoulder 33 of head 22 to which barrel 2 is screw threaded.

This tube 30 has midway of its ends a conical enlargement 34 on its exterior which when the parts are all properly assembled come opposite the enlarged ends 26 of fingers 25 and serveto lock said fingers in the recesses 27 of coupling 6. If now the plungerv 14 raises above its usual stroke, the excess movement of the piston is taken up by the spring-controlled tube 30 and ordinarily when the piston descends, the sprin 31 of tube 30 will force the tube down into its normaly position to lock fingers 25 in 'the coupling 6. Should for any reason the spring 31 fail to act properly, the sucker or piston rod 21 is provided with preferably a star shaped collar 35 vadapted to strike upon the upper edge of tube 30 and force said tubedownward as the plunger 14 descends,

Nhile I have described the sections 1 as a ywell casing it should be understood that said sections may constitute a pump tube for use within well casings already installed.

Having thus described the nature and objects of my invention what I claim as new and desire to secure by Letters Patent, is l. In a pump, a section of well casing, a pump barrel inclosed in said section, a tubular head in screw threaded engagement with the upper end of said barrel, a coupling connecting-the section of casing with the next preceding section of casing, a means for detachably locking the head to the coupling, a piston traversing the barrel, and a take-up means traversing the head and entering the barrel, said takeup means arranged in the ,path of the piston to receive the upward thrust of said piston and thereby prevent accidental displacement of the head in said coupling.

2. In a pump, a section of well casing, a coupling connecting said section with the next preceding section, a tubular head arranged within said coupling, a packing interposed between the head and coupling, a lower coupling provided with a valve seat arranged on said section, and a pump barrel detachably connected to and supported by the head, said barrel provided with a lower valve entering and supported by the valve seat of the lower coupling in connection with a piston traversing the barrel, a tube extending through the head into the barrel, a means for locking the head to the upper coupling, said tube constituting a meansl for holding the locking means Jfor the head in place, and a spring interposed betweenv the lower end of the head and the lower end of the tube, said spring arranged to project the tube downward in the head in the path of the piston to prevent said piston 'from directly engaging said head.

3. VIn a pump, a section of well casing, a pump barrel inclosed by said section, a tubular head detachably engaged with the upper end of said barrel, a coupling connecting said section with ya next preceding section of casing, a means for detachably locking the head to the coupling, a piston traversing the barrel, 'a piston rod traversing the head, a takeup means under spring tension traversing the head and extending into the barrel in the path of said piston to receive the upward thrust of said piston and prevent the piston striking said head, and a collar on the piston rod adapted to strike the takeup means to return said means to its normal `po-` sition after being moved by lsaid piston.

In testimony. whereof I have signed my name to this specification.l

ARTHUR LEE LrGoN. 

